US1130113A - Globe-holder for electric, gas, and other lamps. - Google Patents

Description

J. A. SHAW.

I GLOBEHOLDER FOR ELECTRIC, GAS, AND OTHER LAMPS.

APPLIOATION TILED JAN. 20, 1914.

1,130,113; Patented Mar.2,1915.

.F/GJ. Fig.2.

THE NORRIS PETERS 60., PHOTG-LITHOH WASHINGTON. n. c.

JOHN AITKEN SHAW, OF WEST MOUNT, -MONTREAL, QUEBEC, CANADA.

GLOBE-HOLDER FOR ELECTRIC, GAS, AND OTHER LAMPS.

- Specification of Letters Patent.

Patented Mar. 2, 1915.

Application filed January 20, 1914. Serial No. 813,199.

To all whom it may concern:

Be it known that I, JOHN AITKEN SHAW, a subject of the King of Great Britain, and resident of 4418 Landsdowne avenue, West Mount, Montreal, Canada, have invented new and useful Improvements in Globe- Holders for Electric, Gas, and other Lamps, of which the following .is a specification.

This invention comprises improvements in globe or shade holders for electric, gas and other lamps and relates to that type of globe or shade holder in which spring arms or clips which may be of bent wire, are housed within an annular recess in the gallery or casing. These arms or clips normally spring toward the center so as to engage the grooved rim of a globe or shade inserted in the holder and the arms having points of support or fixture on the gallery or casing, support the globe from the latter in an easy and resilient manner. In order to remove the globe, the spring arms are moved outwardly so as to disengage from the grooved rim of the globe. To facilitate the disengagement, the free ends of the spring arms are overlapped or crossed and the extremities, which are suitably bent outwardly, are preferably furnished with knobs or handles, so that by grasping these latter and pressing them toward one another the spring arms are readily moved outwardly and disengaged as aforesaid. Now it frequently happens that one spring arm is stiffer or possesses a greater resistance to bending than the other and the consequence is that whereas the weaker spring arm is moved outwardly into the annular recess in the gallery, the stronger spring arm is not moved outwardly sufliciently by v the time that the knobs or handles are pressed into contact with one another. The result is that the rim of the globe, upon the latter being removed, fouls the stronger spring arm, and this accounts for many breakages. Even if there be but little difference between the strengths of the springs, it is not certain that the one knob, which is being pressed by the thumb of the operator will be moved over the same distance as the other knob which is being pressed by a finger and therefore unequal pressures upon the knobs will have the same result as above described in connection with springs of unequal stiffness.

This invention provides a construction of such a holder in which the spring arms are so formed that the extremities or. knobs are movable toward or from one another in the same plane and are stopped in theirmovement toward one another by a stop against which they are pressed when in the globe releasing position.

The invention while applicable to lamps generally is particularly applicable in the case of pendant or bracket electric lamps on railway carriages where the globes require to be attended to in a limited amount of time and where it is not always possible to rely upon such careful treatment being given to the globes or shades as may be given in other places.

In order to enable the invention to be readily understood, reference is made to the accompanying drawings in which Figure 1 is a side elevation of the improved globe or shade holder with the spring clips in the inoperative position. Fig. 2 is a side elevation showing the spring clips in the operative position. Fig. 3 is an inverted plan of Fig. 1 and Fig. 4 is an inverted plan of Fig. 2.

Referring to the drawing the gallery or casing a is bell-shaped and adapted to contain or receive an incandescent electric lamp or the upper portion or holder thereof but the gallery may be of any shape or type as circumstances may require. Around the bottom of the casing a is formed an annular recess 6 for housing the spring arms or clips 0 0. The last named are suitably formed by bending a. single piece of wire into approximately circular form and crossing or overlapping the ends thereof, the extremities (Z (Z being bent outwardly, as seen in Figs. 3 and 4:, and furnished with suitable knobs or handles 6 e.

The end portions of the wire are suitably flattened or cut away where they cross or overlap as seen best in Figs. 1 and 2 these portions being indicated by the lines f Figs. 1, 3 and 4, these cut away portions enabling the extremities cl cl to lie in about the same plane.

The wire ring is preferably formed with a bend, or kink g or it might be a loop, at a point diametrically opposite the knobs e e and at this point the ring is soldered to the casing or gallery.

Slots h are formed in the recessed portion 12 of the gallery or casing a at the points where the extremities d d emerge, the .slots being of suflicient length circularly to permit of moving the extremities (Z d over the required arc for releasing or engaging the arms 0 c from or with the globe or shade. Now owing to the separate slots h it being formed, the intermediate piece 7' acts as a stop for the extremities d d when drawing the two knobs e e toward one another in the act of expanding the clip or holder, and when the said extremities are in contact with the stop piece 7' it will be observed from Fig. 3 that the arms or clips 0 0 are COI11- pletely within the housing and out of the way of the globe rim which is to be inserted into or which is being removed from the holder. 7

' Instead of two separate slots'h h a single slot may be formed and a cross piece may be secured across the same in the position of the stop piece j, or any other suitable stop may be employed for limiting, in like manner, the movements of the extremities d cl toward one another.

I claim a 1. Globe or shade holder comprising a gallery, bowed spring clip arms mounted on said gallery and adapted to contract into engagement with the rim of a globe or shade inserted into said gallery said arms each having one end overlapping the adjacent end of the other arm, said overlapping ends being of reduced thickness, means on the said ends adapted to be pressed toward one another for causing the saidarms to be expanded in order to release them from the globe or shade, said means being movable in the same plane owing to the reduced thickness of said ends, and stopping means adapted to limit the releasing movement imparted to the said arms substantially as set forth.

2Q Globe or shade holder comprising a gallery formed with an annular recess, bowed spring clip arms mounted on said gallery and adapted to contract into engagement with the rim of a globe or shade inserted into said gallery and to be exdop ies of this patent may be obtained for panded'into the recess in said gallery for the purpose of releasing such globe or shade said arms each having one end overlapping an adjacent end of the other arm, the overlapping ends being of reduced thickness, outwardly directed projections on the extremities of said overlapping ends said projections extending through an aperture in the recessed portion of said gallery, and being movable in the same plane owing to the reduced thicknessof said ends, and a stop in said aperture disposed between said projections for limiting the movement thereof when pressed together for expanding the arms substantially as and for the purpose set forth.

3. Globe or shade holder comprising a gallery formed with an annular recess two circumferential slots being formed in said recess, bowed spring clip arms mounted on said gallery and adapted to contract into engagement with the rim of a globe or shade; inserted into said gall ery and to be expanded into the recess in said gallery for the purpose of releasing such globe or shade said arms each having one end overlapplng an ad acent end of the otherarm, said overlapping ends being formedwlth inclined flats on their engaging adj acent'ly surfaces, outwardly directed projections on V the extremities of said overlapping ends said projections extending through respective apertures in the recessed portion of said gallery, and being movable in the same plane toward or from one another owing to the presence of said flats, the metal of the casing lying between the adjacent ends of the two slots serving as a stop for limiting the movement of the pro ectlons when pressed together for expanding the arins'substantially as and for the purpose set forth,

l/Vitnesses:

CHAS. IsAAos, JAs. M. OCoNNoR.

Washington, D. C.

JOHN AITKEN SHAW. i?

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